All Questions
Tagged with matrix-multiplication hill-cipher
6 questions
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2
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What weaknesses are worth investigating in this non-linear matrix cipher?
I have an interesting cipher based on matrix products that I've not seen before.
Given plaintext bytes $p\in[0,255]$, pad to a perfect square length and write into the entries of an $n\times n$ matrix ...
- 103
1
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1
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Hill Cipher Plaintext Attack: Dealing with Non-uniqueness of Matrix Inverses?
I'm following along with my book. Here is an example of a plaintext attack from it:
It is known that:
plaintext = 'friday'
ciphertext= 'pqcfku'
$m$ = 2
We will use this to form the following matrix ...
- 135
-1
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1
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Problem while decrypting Hill cipher
I have a plaintext "monday" and ciphertext "IKTIWM" and $m=2$.
I want to find the key of the Hill cipher.
I made a matrix
$$ \begin{bmatrix} a_1 & a_2 \\ a_3 & a_4 \end{bmatrix}\begin{...
- 161
2
votes
1
answer
575
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Hill Cipher question
Recently, I was given three ciphers to crack for my cryptography class. At this point, I have guessed that one of them is likely a Hill cipher (probably 3x3, as that is the most complex we have done ...
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2
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1
answer
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Hill cipher cryptanalysis - known plaintext known key size
Hello I want to know how to go about this problem
I know the plaintext "abcdef" and the ciphertext. The key size is 2.
I really can't figure out how to find the key for decrypting and encrypting.
1
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2
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583
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hill cipher encryption way 1x3 plaintext matrix
Can someone help me with a Hill cipher?
When do I have to use:
1x3 plain text matrix (p1, p2, p3) * 3x3 key matrix
3x3 key matrix * 3x1 plain text matrix
Or they are both correct?
I tried to ...
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